Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 120gr | Barnes Solid bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Ramshot Grand.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 53,954 psi | 85% | 3274 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,782 psi | 89% | 3438 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 86% | 55,245 psi | 87% | 3376 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 90% | 57,537 psi | 90% | 3448 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 56,130 psi | 88% | 3406 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3428 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,390 psi | 87% | 3366 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,056 psi | 86% | 3373 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,795 psi | 86% | 3356 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,114 psi | 85% | 3373 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,796 psi | 87% | 3350 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,014 psi | 88% | 3415 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,652 psi | 89% | 3438 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,389 psi | 85% | 3415 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,708 psi | 86% | 3327 fps | 96.5% |
| Bofors RP15 | <<locked>> | 92% | 57,087 psi | 89% | 3422 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 55,927 psi | 88% | 3419 fps | 99.3% |
| Bofors RP5 | <<locked>> | 88% | 54,114 psi | 85% | 3373 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 94% | 53,708 psi | 84% | 3363 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 88% | 56,623 psi | 89% | 3369 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,666 psi | 87% | 3353 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,332 psi | 87% | 3287 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,911 psi | 86% | 3501 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2234 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,580 psi | 90% | 3353 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 54,433 psi | 85% | 3297 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,188 psi | 90% | 3356 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 55,695 psi | 87% | 3422 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,169 psi | 79% | 3323 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 57,653 psi | 90% | 3333 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,188 psi | 88% | 3330 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,680 psi | 87% | 3304 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,129 psi | 86% | 3350 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3350 fps | 99.8% |
| Norma MRP | <<locked>> | 86% | 54,128 psi | 85% | 3392 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 56,043 psi | 88% | 3350 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,927 psi | 89% | 3445 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 82% | 55,085 psi | 86% | 3350 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,724 psi | 87% | 3366 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 60% | 2283 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,985 psi | 89% | 3422 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,188 psi | 88% | 3488 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,825 psi | 87% | 3435 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 86% | 55,811 psi | 87% | 3337 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 86% | 54,520 psi | 85% | 3350 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,653 psi | 90% | 3333 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,188 psi | 88% | 3330 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,681 psi | 89% | 3278 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,114 psi | 85% | 3343 fps | 99.4% |
| Somchem S361 | <<locked>> | 86% | 57,624 psi | 90% | 3320 fps | 98.7% |
| Somchem S365 | <<locked>> | 84% | 57,450 psi | 90% | 3353 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,027 psi | 86% | 3317 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 82% | 57,667 psi | 90% | 3340 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,897 psi | 86% | 3297 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 82% | 56,884 psi | 89% | 3343 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,537 psi | 90% | 3379 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,464 psi | 90% | 3458 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 92% | 54,578 psi | 86% | 3369 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 96% | 56,057 psi | 88% | 3438 fps | 98% |
| Vihtavuori N570 | <<locked>> | 98% | 57,348 psi | 90% | 3504 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,464 psi | 90% | 3278 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,405 psi | 87% | 3435 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,868 psi | 86% | 3307 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,002 psi | 64% | 3022 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 82% | 45,701 psi | 72% | 3219 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 44,817 psi | 70% | 3166 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 80% | 40,205 psi | 63% | 3084 fps | 95% |
| ADI AR 2217 | <<locked>> | 88% | 39,552 psi | 62% | 3054 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 33,649 psi | 53% | 2936 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,339 psi | 71% | 3166 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,532 psi | 81% | 3310 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,918 psi | 70% | 3159 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,857 psi | 64% | 3094 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,653 psi | 62% | 3048 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,127 psi | 53% | 2946 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,788 psi | 70% | 3219 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,386 psi | 79% | 3340 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 51,242 psi | 80% | 3258 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 38,014 psi | 60% | 3018 fps | 95.5% |
| Bofors RP30 | <<locked>> | 86% | 39,305 psi | 62% | 3068 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 40,857 psi | 64% | 3094 fps | 96.7% |
| Hodgdon H1000 | <<locked>> | 84% | 37,565 psi | 59% | 3005 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 42,931 psi | 67% | 3094 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,047 psi | 66% | 3074 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,501 psi | 76% | 3173 fps | 100% |
| Hodgdon Retumbo | 81.9 gr | 82% | 35,795 psi | 56% | 3045 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 2008 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,488 psi | 79% | 3225 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 51,053 psi | 80% | 3238 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,990 psi | 69% | 3091 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 82% | 41,771 psi | 65% | 3130 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 40,640 psi | 64% | 3110 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 54,230 psi | 85% | 3274 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,620 psi | 82% | 3268 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 35,201 psi | 55% | 2877 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 51,503 psi | 81% | 3281 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 35,578 psi | 56% | 3002 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 43,395 psi | 68% | 3176 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 52,373 psi | 82% | 3287 fps | 100% |
| Ramshot Grand | 84.3 gr | 82% | 41,901 psi | 66% | 3143 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 51,547 psi | 81% | 3287 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,998 psi | 55% | 2927 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 2054 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,939 psi | 83% | 3353 fps | 100% |
| ReloadSwiss RS 76 | 85.5 gr | 80% | 32,721 psi | 51% | 2930 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 44,048 psi | 69% | 3196 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 45,905 psi | 72% | 3143 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 44,425 psi | 70% | 3146 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,230 psi | 85% | 3274 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,620 psi | 82% | 3268 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,171 psi | 83% | 3219 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,092 psi | 69% | 3140 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 47,036 psi | 74% | 3123 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 49,937 psi | 78% | 3232 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,875 psi | 70% | 3120 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 53,896 psi | 84% | 3278 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,146 psi | 61% | 2976 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 53,258 psi | 83% | 3281 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,005 psi | 69% | 3133 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,163 psi | 68% | 3163 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 41,191 psi | 65% | 3087 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 44,976 psi | 70% | 3212 fps | 95% |
| Vihtavuori N570 | <<locked>> | 96% | 53,171 psi | 83% | 3422 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,432 psi | 84% | 3215 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,275 psi | 58% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,379 psi | 65% | 3035 fps | 96.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 63 powders for 7 mm KM Katzmaier loaded with the .284 | 120gr | Barnes Solid. Vihtavuori N570 delivers the highest muzzle velocity at 3,504 fps; across all powders the maximum-charge window runs from 2,234 fps to 3,504 fps. ADI AR 2225 gives the best case fill at 100 %, and 63 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, IMR 8133 Enduron reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon Retumbo, ReloadSwiss RS 76, Ramshot Grand rank at the top here: for 7 mm KM Katzmaier with the .284 | 120gr | Barnes Solid they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.